android_recyclerView+SmartRefreshLayout实现上拉加载下拉刷新列表

compile 'com.scwang.smartrefresh:SmartRefreshLayout:1.0.3'

compile 'com.android.support:recyclerview-v7:25.3.1'

  compile 'com.zhy:okhttputils:2.0.0'

layout

<com.scwang.smartrefresh.layout.SmartRefreshLayout
    android:id="@+id/smart"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
        <android.support.v7.widget.RecyclerView
            android:id="@+id/recyclerView"
            android:layout_width="match_parent"
            android:layout_height="match_parent"/>
</com.scwang.smartrefresh.layout.SmartRefreshLayout>

activity

private RecyclerView recyclerView;
private List<String> list;
private LinearLayoutManager linearLayoutManager;
private MyAdapter adapter;
private int page = 1;
private SmartRefreshLayout refreshLayout;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    findView();
}

private void initData() {
    OkHttpUtils
            .get()
            .url(HttpUtil.URL_LIST)
            .addParams("userId", "213132")
            .addParams("page", page + "")
            .addParams("pageSize", "10")
            .build()
            .execute(new StringCallback() {
                @Override
                public void onError(Call call, Exception e, int id) {

                }
                @Override
                public void onResponse(String response, int id) {
                    try {
                        JSONObjectobj = new JSONObject(response);
                        JSONArray data = obj.getJSONArray("data");
                        if (data != null) {
                            for (int i = 0; i < data.length(); i++) {
                                JSONObject obj2 = data.getJSONObject(i);
                                String buyTitle = obj2.optString("note");
                                list.add("标题：" + buyTitle);
                            }
                        }
                        adapter.notifyDataSetChanged();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }
            });

}


private void findView() {


    recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
    refreshLayout = (SmartRefreshLayout) findViewById(R.id.smart);
    list = new ArrayList<>();
    adapter = new MyAdapter(list, this);
    linearLayoutManager = new LinearLayoutManager(this);
    linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
    recyclerView.setLayoutManager(linearLayoutManager);
    recyclerView.setAdapter(adapter);
    initData();




    refreshLayout.setOnRefreshLoadmoreListener(new OnRefreshLoadmoreListener() {
        @Override
        public void onLoadmore(RefreshLayout refreshlayout) {//上拉加载
            page++;//每次上拉page+1
            initData();//初始化数据
            refreshlayout.finishLoadmore();//完成上拉加载
            refreshlayout.finishRefresh();//完成下拉刷新
        }

        @Override
        public void onRefresh(RefreshLayout refreshlayout) {//下拉刷新
            page = 1;//page恢复到1页
            list.clear();//list清空一下
            initData();//重新初始化数据
            refreshlayout.finishRefresh();//完成刷新操作
        }
    });
}